Social Media Aspect Ratio Calculator

What Is Aspect Ratio and Why Does It Matter for Social Media?

Aspect ratio is the relationship between a piece of content's width and its height, expressed as two numbers separated by a colon — for example, 16:9 means 16 units wide for every 9 units tall. It does not describe the actual size of the image, only its proportions. A 1920×1080 video and a 1280×720 thumbnail both share the same 16:9 aspect ratio.

Social media platforms enforce specific aspect ratios for a simple reason: their apps are designed to fill screens efficiently. When a platform displays a post, it reserves a fixed-shape slot in the feed or viewer. If your image does not match that shape, the platform automatically centre-crops it to fit — cutting off whatever falls outside the expected proportions. That means a face positioned near the edge, a key headline at the bottom, or a logo in the corner can silently disappear before your audience ever sees it.

This is why getting the ratio right before you design — not after — saves hours of rework. Designing at the correct dimensions from the start means your composition, typography, and focal points are all placed with the final crop in mind. Trying to retrofit the wrong ratio after the fact usually means redoing the layout from scratch. Use this calculator to confirm the exact dimensions you need before you open your design tool, and you will never be caught off-guard by an unexpected crop.

Instagram Image and Video Sizes — Complete Guide

Instagram supports six main content formats, each with its own recommended dimensions. Understanding which to use — and when — is the difference between a polished feed and one that looks inconsistent.

Feed Square (1080×1080 px, 1:1): The classic Instagram format. Square posts look the same on every device and create a uniform, tidy grid appearance. This is the safest choice if your content needs to work across multiple placements.

Feed Portrait (1080×1350 px, 4:5): Portrait posts take up more vertical space in the feed, which means more screen real estate and more stopping power. If you can only publish in one feed format, 4:5 is often the best choice for organic reach.

Feed Landscape (1080×566 px, 1.91:1): Landscape posts feel cinematic and work well for wide scenic shots, but they occupy less vertical space in the feed, which can reduce engagement compared to portrait.

Story and Reels (1080×1920 px, 9:16): Full-screen vertical format. Keep critical content away from the top and bottom 250 pixels where Instagram's UI overlays appear. Stories and Reels share the same canvas.

Profile Picture (320×320 px, 1:1): Displayed as a circle at roughly 110 pixels in the feed — use a bold, simple image with no small text. Instagram down-samples anything wider than 1080 pixels on upload, so always export your feed content at exactly 1080 pixels wide for optimal quality.

Carousel (1080×1080 px, 1:1): All slides in a carousel must use the same aspect ratio. Set the ratio on the first slide and keep it consistent across all cards to avoid the platform auto-cropping subsequent slides differently.

YouTube, TikTok, and Facebook Size Cheat Sheet

These three platforms cover the majority of video and static content distribution. Here are the most important dimensions to know.

YouTube Video (1920×1080 px, 16:9): The gold standard for all horizontal video content. Upload at 1080p minimum to qualify for the HD badge. YouTube scales the video down for lower-bandwidth viewers automatically.

YouTube Thumbnail (1280×720 px, 16:9): Thumbnails have a strict 2 MB file size limit. Your thumbnail is arguably your biggest click-through lever on YouTube — make the text large, the contrast high, and the focal point immediately obvious at small sizes.

YouTube Shorts (1080×1920 px, 9:16): Identical canvas to TikTok and Instagram Reels. If you create a 9:16 vertical video, you can publish it on all three platforms with minimal changes.

TikTok Video (1080×1920 px, 9:16): Leave approximately 150 pixels of safe zone at the top and bottom of the frame where TikTok's UI elements (like and share buttons, username, caption) overlay the video.

Facebook Feed Post (1200×630 px, auto-cropped to 1.91:1): Facebook previews links and posts at 1.91:1. If your image is taller, Facebook will centre-crop it automatically.

Facebook Cover Photo (851×315 px on desktop): Note that the mobile crop differs slightly from desktop — keep your most important content within the central safe zone. YouTube, TikTok, and Instagram Reels all accept the same 9:16 vertical video, so design once and publish everywhere.

Tips for Designing Content Across Multiple Platforms

Creating content for multiple platforms does not have to mean starting from scratch each time. These strategies will save you significant time and keep your visuals consistent.

Understand the safe zone concept. Every platform places UI elements — buttons, usernames, captions, navigation bars — over the edges of your content. The safe zone is the inner area of the frame where your key content is guaranteed to remain visible. For 9:16 vertical video, this typically means avoiding the top and bottom 10–15% of the frame.

Design for the most restrictive format first. If you need content in both 1:1 and 4:5, design in 4:5 and your 1:1 crop will still look good when centred. Designing in the smaller format first means you are always expanding outward rather than cutting inward.

Use artboards for multi-format design. Figma, Canva, and Adobe Express all support artboards or frames at custom dimensions. Set up one artboard per platform format at the start of your project and design all variants simultaneously — this prevents last-minute resizing surprises.

Upload at the recommended resolution. Most platforms down-scale images that exceed their display dimensions. Uploading a 4× oversized image wastes bandwidth, increases upload time, and does not improve visible quality. Stick to the platform's recommended dimensions listed in this tool.

Plan your watermark placement around the aspect ratio. If you add a logo or watermark to your content, position it with the final cropped frame in mind. A watermark that sits safely in a 16:9 frame might be cropped entirely when the same image is displayed at 1:1. Design your brand placement last, after confirming the crop for every target platform.

Frequently Asked Questions